Blade anchoring wedge



May 10, 1938. J. w. SCHMIDT BLADE ANCHORING WEDGE Original Filed Nov.50,-1936 m, m M f Reiaued May 10, 1938 UNITED STATES PATENT. OFFICEBLADE ANCHORING WEDGE Joseph W. Schmidt, Milwaukee, Wis.. assignor toWetmore Reamer 00., Milwaukee, Wis., a cornotation of Wisconsin OriginalNo. 2,096,472, dated October 19, 1937,

Serial No. 113,324, November 30,1936. Application for reissue February12, 1938, Serial No. 190,310

Claims. (Cl. 29-105) This invention relates to improvements in bladeanchoring wedges, The invention has particular application to wedges forthe retention of blades inserted in a reamer or other rowedge and withthe tool body 8, to maintain an operative connection between theseparts.

Any desired means, such as the polygonal socket [2, may be provided forthe reception of 5 tary cutting tool. a wrench suitable for themanipulation 01' the 5 It is the primary object of the invention toadjusting screw.

provide a blade anchoring wedge with adjust- Iclaim: ins means whichlsnot only adapted to seat 1. In a device ofthe character described, thethe wedge for the retention of the tool, but is combination with a toolbody having a longitualso adapted to provide support for the wedge dinalslot upon it p p y and provided with 10 when the wedge is free of thetool, and to release an inclined bore intersecting the slot, ci a toolthe wedge from clamping engagement with the blade in the slot, agenerally cylindrical wedge tool and thereby to obviate the necessityfor usreciprocab e in t e e a d having o vfi ing a hammer for therelease of the wedge. face finished for clamping engagement with 16 Morespecifically, Ipropose to adjust the wedge said blade, an adjustingscrew for said wedge in both directions by manipulation of a righthaving right and left hand threaded portions, and left hand screw, inthreaded engagement one of said portions being of reduced diameter bothwith the wedge and the body of the tool, as compared with the other, oneof said portions whereby to accomplish the functions aforesaid. being inthreaded connection the we m In the drawing: and the other beingthreaded c mection with 20 Figure 1 is a fragmentary side elevation 01'a rotatable cutting tool embodying the invention.

Figure 2 is an end elevation of the tool, a por tion thereof beingbroken away to a section exposing the wedge adiustin'g means.

Like parts are identified by thesame reference characters throughout theseveral views.

My improved tool comprises a body portion 3 having suitable slots 4 inits periphery for the reception of renewable tool blades 5.

The bores 0 intersect the slots 4 and are equipped with generallycylindrical wedge members I, having their faces flattened at 8 forengagement with the respective tool blades 5.

clined face converging inwardiy toward the i ing bearing against saidface and said body.

2. The combination tooi body, having a peripheral slot provided withawedge opening intersecting the tint and having a '0! a tooi blade inthe slot, wedg in the on is an adjusting screw for the wedge right andleft hand threaded portions, the nor said screw engaged the wedge beingrelatively large diameter, and a portion said screw engaged in the toolbody being of smaller diameter, the larger portion 01' said screw hawing a terminal socket adapted. to receive a From t bottom f each b 5there t wrench for the manipulation 0f the screw. 35 into the body oithe tool a tapped socket 9 to An anchor wedge assembly comprisingareceive the smaller threaded end oi an adjustwedge shaped anchor blockhaving screw ing scr w in The wedge 1 has an an threaded bore extendingthrough the block in gned apert h the direction in which its sidesconverge, in comure w ich is oppositely threaded to receive 40 thelarger end of the adjusting screw bination with a block anchoring screwhaving 40 The respective ends of th a first portion extending throughthe bore and in e adjusting screw have m ht screw threaded engagementwith the block and g and left hand threads, as illustrated. In come asecond portion of reduced diameter and threadquence, the rotation of thescrew in one m M ed in the opposite direction, said reduced portion 5rec on will draw the wedge I downwardly into being adapted to passfreely through the bore bore 8 to seat its face 0 in clamping engagementinto engagement th a, smaller threaded bore with the tool blade 5. Theopposite rotation of in a t d support into which the wedge the adjustingscrew will force the wedge from may be drawn with p ogressivelyincreasing its binding engagement with the tool blade and pressure whenthe screw is turned in one direcwill gradually withdraw the wedge to aposition tion, and from which it may be forced when the 50 where thetool may readily be removed and rescrew is turned inthe other direction.placed. Even when the wedge is free of the 4. An anchor wedge assemblycomprising the tool it cannot iall from the bore 0, in which itcombination 01' a wedge shaped anchor block operates, since the threadsof the adjusting formed for entry in a correspondingly contoured a screwwill remain in engagement, both with the socket in a support at one sideof a device to be 56 anchored to such support, said anchor block havinga bore extending through the block in the general direction ofconvergence of its side faces, and a screw having one portion inthreaded engagement with the block within the bore and another portion01' reduced diameter, adapted to pass loosely through the bore andprovided with differently pitched threads for engagement in acorrespondingly threaded bore in the support.

5. In a device of the character described, the combination with abodyproviding a seat for a part requiring to be anchored in said seat, of-awedge movable to and from anchoring pressure engagement with said part,said wedge and body having aligned apertures of different diameters andprovided, respectively, with threads of differing pitch characteristics,and an adjusting screw in the aligned apertures of the body and a thewedge, provided with portions of different diameters complementary tothe respective apertures and having differential threads complementaryto the threads of the wedge and body, respectively, the threaddifferential being such that in one direction of screw rotation thewedge may be drawn toward said body into retaining engagement with saidpart, and in the other direction of rotation the wedge may be withdrawnfrom said body and from retain ing engagement with said part.

JOSEPH w.

